The Nival-helmed strategy game Prime World will encourage you to stick with your own gender by giving discounts to men who buy male characters and women who buy female characters.

"Basically we have discounts for some of starter characters depending on gender of a player," Nival president Sergey Orlovskiy said in an e-mail to Kotaku. "If you're male you can get several male heroes cheaper, and if you're female you'll get some of female heroes cheaper. Point was not just to encourage playing characters of your own gender, but to encourage using some specific character roles in a game."

In addition, groups that include both men and women will receive certain combat bonuses.

This seems like a bizarre decision by Nival. For various reasons, sometimes people just prefer playing characters of the opposite sex. But Prime World will determine your gender by asking you to connect your Facebook account to the game. So if you're a girl who prefers to play as a boy or a boy who prefers to play as a girl, start prepping that dummy Facebook now.